Assionqb



v- AFPLICATION- FILED APR. 11,1918. 1, 93 244 Patented Oct 11, 1921.

3 SHEETSSHEET L H. L. PITMAN: COMBINED TYPEWRITING ANECOMPUT ING MACHINE, APPLICATION FILED APR-11; I918- 7 393,244. Patented Oct. Li, 1921.

3 SHEETS-SHEET 2.

. H. L, PITMAN. COMBINED T YPEWRITING AND COMPUTING MACHINE.

APPLICATION FILED APR. II, 1918- Patented Oct. 11, 1921 3 SHEETS-SHEET a.

assen.

' "UNITE a ine tia? L. 21mm, or ELIZABETH, NEW JERSEY, nssisncn 'l-0 unnnnwcon cone tome mama COMPANY, or new roan, ii, a ccnrcna'rron or new Yon-n.

COMBINED TYPE'WRITING AND QOMIUTIITG MACHINE.

Specificatiouoi Letters Eatent. Patenfi gdlfieyij, 11, 1921,

Application fi led April-1'1, 1913. Serial No. 227,976.

' which the following is a specification.

This invention relates to typewriting and computing machines, and particularly to those in which a master-wheel is employed.

The invention is herein disclosed as applied to the well-known Underwood addendagraph, in which a key-driven masterwheel is mounted upon the stationary framework, while the computing wheels travel.

The typewriter'carriage is returned auomatically when the last digit of a number is computed or when the line is completed;

and it hasbeen the practice when employing carriage-returning mechanism for the operative to actuate the final ty e-key with unusual speed, and then to wait until the carriage returns.

This mode of operation is a burden upon the operative. In casehe. fails to be alert, the masmr-Wheel may happen to be in an abnormal position (due to 21v numeral key being partially depressed'while the carriage is returning), so that a collision may occur between the teeth of the com uting wheels and the teeth of the master-w eel. One ob: ject of the invention is to avoid this (iiiiig culty. To this end, the carriage is prevented. from returning during the actuation of the computing mechanism by connecting the numeral keys with the carriage-returning mechanism in such a manner that after typing the final digit the started carriage-returning mechanism will be held in abeyance until the end of the UP-St-IOkB of the numeral key.

It has been customary for the operative to watch the returning carriage so as not to depress a tabulator-key until the can riage has finished returning. This is necessary in order to avoid a collision between the tabulating stops and the column dogs.

To avoid this burden upon' the operative, I provide a. member which prevents the depression of any decimal-tabulator-key when the carriage is retr hing.

It is customary to arrange the wheels in denominational groups, each group separated from the next b one letter-space. so that a punctuation math maybe typed upon the work-sheet between the groups. 'When a. punctuation space 1s at the computing point the niaster-wheel is not in mesh'with any computing wheel.

It may happen. that the operative will inadvertently depress a numeral key when a punctuation space is at thecomputing point, thereby causing a digit to be typed. upon the work-sheet without any computation taking place, and other errors may follow.

I have provided. improved mechanism for lockingthe numeral keys when a punctuation s iace is at the computing point, and for controlling said lock directly from the a talizer. It will not be necessary for-the op erative to make separate readjustments of the locking devices whenever a ",totalizer 1 shifted along the carriage.

The totahzer has cams arranged in con formity with the punctuation spaces between dial wheels, so that said cams will be ef" fective to actuate the numeral-key-locking mechanism whenever a punctuation space is at the computing point.

I overcome clatter and Wear by providing .i

means whereby this key-locking mechanism may beheld in cotiperative position with the cams at the rear of the totalizers durin the letter-feed1ng movements of the carriage, and may be withdrawn from cot-peratrve pothc carriage. p

The carriage-returning mechanism is so sition with said cams during the return of connected with this key-locking mechanism that the part thereof which normally lies in the path. of said cams will be moved out of such path during the return of the carriage.

It has been the practice in machines of this type to employ an electric motor for is. turning the carriage, I have improved the construction of the switch for closing the circuit through the motor and of the con-- nections between the switch and the car .riage-returning mechanism, so that fine Other fe tures and advantages will hereinafter appear. 1

1n the accompanying drawings,

Figure 1 is a sectional side elevation of an Underwood addendagraph, showing the invention applied thereto.

F ig. 2 is a fragmentary sectional side view of the right-hand margin stop and a portion of the adjacent mechanism.

Fig. 3 is a sectional front elevation of the machine with parts omitted for clearness and parts broken away to show the underlyin structure.

l ig. 4 is a skeleton perspective View of portions of the machine, showing the invention applied thereto.

Numeral keys 10 and character keys 1 (Fig. 1) mounted onkey-levei's 12, are connected to rock hell-cranks 13 connected. to swing types Ll fast on typehars 15 up Wardly and rearwardly against a platen 16 revolubly mounted on a typewriter carriage 17, which is adapted to travel laterally on rails 18 19, mounted at the front and rearv of the platen.

To cause the typewriter carriage 17 .to 'r'nove'step by step, each of thetype-bars 15 is provided with a heel 20 which thrusts rearwardly a universal. bar 21 (Fig. l), to actuate an escapement mechanism, llltlh. cated in general at 252 (FiggS), usually provided with a pinion which co-acts witli rack-bar 24l- (Figs. 1 and 3), pivoted at 25-.

to the typewriter carriage 17, Which is driven by a spring drum 26 and a draw band A left marginal stop 30 (Figs. 1 and 4) is adjustable on a frame 31 supported for swinging movement on a shaft 28 mounted on the frame worlr and has an index 32 for use with a scale 33. A. spring 29 normally holds frame 31in raised position.

A right adjustable marginal stop 34: (Figs. 2 and 4) has an index 35 to co-act wit-lithe scale 33/ Each numeral. key-lever 12 has attached thereto a valuating member 10 (Figs. 1 and 3), to rocka uni.vers:-1l bail 41 an amount directly proportional to the digital value of the key.

This universal bail 41 is operatively connected with a non-traveling master-wheel 42 (Fig. 1). -A plate'4l3 forming part of the typewriter carriage 17, carries, adjustably positioned thereon totalizers 44 having computing wheels 45 to mesh with the mast-en wheel. A. driving gear 46 for said masterivheel isactuated by mechanism partially ilhistrated at ig. 1,. and controlled by the universal bail 11, as more fully illustrated and described in my co-pending application,

Serial No. 2 1,390, filed April28,1915. (New Patent No. 1,308,506, dated July 1, 1919).

The (leciinal-tabulating ,mechanism inclinics keys 50 (Fig. 1) attached to levers 51 returning'mechanism silenced. This is acand depress a link 62, the upper end of which fthrough the intermediary of connections in- I said levers raise denominational stops 53 into the path of column stops or dogs 54 on a rack-bar 55011 the carriage 17.

To start the carriage-returning mechanism at the end of a computation, an extension 60 (Figs. 1 and 4) on the carriage 17 trips a latch 68, which normally holds the carriagecomplished by placing the left marginal it stop 30 so that a pivoted cam 61 thereon will.

be actuated by said extension to swing the frame 31 on which said step 30 is mounted is pivoted to a bracket 31 and the lower end ofywhich is connected to swing a lever 63,;pivoted on a fixed paitol: the frame, to trip said latch which is formed on the forward'end. of a thrust bar 65. It will be understood that shaft 28 is not affected by a' rocking or swinging-movement of frame 31. lYhenthe latch 68 is thu'stripped, a spring 617 will. actuate the thrust bar rearwardly tq swingia transverse rock-shaft 71, which,

di cated in general at 72, closes, a-clutch. 73 to coiinect the carriage 17 with the .motor-'- driven mechanism 74which has a pinion 75 meshing with a rack 76 onthe carriage, thereby-driving the carriage back. 9 .T'o arrest-the returning-carriage, the driv in'g hlutcli .73 is opened by the extension 60 striking against cam 88 (Fig. 43:) mounted on an arm 89 splined onshait 28 and associated with the right marginal stop 34 and 0' embraced therehy, to actuate connections in-' clutch. thereby disconnecting the carriage,

It will he understood that arm-89 will accompanying stop 3i when the latter is 195 moved to, different positions along scale Depression of armSll, due to engagement of cam 88 by extension 6i), will rock shaft 28. and this movement will be transmitted to shaft 39 by means of arm 36, link 37 and 1 0 arm 38. From shaft 3'9 motion is transmitted by arm :7, link 48 and a relatively long link 49, slidahly mounted at one end on a pin 49, to an arm 57 fixed on a shaft 58 at the rearo'l. the machine. Another-arm 59 115 on shaft 58 carries at its free end a ball extending into a groove l' Fr on a sliding collar carrying gear 75, and serves to control clutch 73. To prevent overthrow of the carriage, the right marginal stop is provided contacts 109, 110, one of which is continually urged by a spring 111 to close the switch, but is held out of engagement with the other contactby a mechanism-connected to and .contact 109 and extends and is guided through an aperture in a base 113 of the switch. To withdraw the plunger 112'- from the upper contact 109 to close the switch, the lower end of the plunger is piV-- oted to the rear end of a lever 115 ful-. crumed on a bracket 116 (Fig. 1) .on the framework. The other end of said lever has a pin-and-slot connection 117 (Figs. 1 and 4) with a rearwardly-e'xtending' arm 11 8 fast on the rock-shaft 71 of the carriagereturnin mechanism, so that when said rock-shaft is actuated bythe carriage 17, when it reaches the left mar 'inal stop'30, the plunger-112 will be wit drawn from said contact 109, which will then be swung against the contact 110, by its spring 111,

thereby closing the circuit through the motor to actuate the driving mechanism 74; to return the. carriage.

To open the switch 108 and break the circuit through the motor 86 when the carriage 17 is returned, the rock-shaft 71 is swung in an opposite direction at theac tu ation of the right marginal stop carriage, through the intermedla ry of the connections 91 and, 72, to. swing the lever 115 and raise the switch plunger 112 and therewith the upper switch contact 109 against the tension of its spring 111 and the spring 67, to separate said contacts 109, 110, thereby opening the switch 108,

at which time the actuation by the motor of the driving mechanism 74 will-cease simultaneously with the opening of the clutch 73.

It will be noted that with this construction, the switch 108 may easily be removed from the machine for repairs or replacement and may easily be returned tothemachine without in any way affecting the adjust mcnts' of the carriage-lemming mechanism. The switch may be loosened from its choragc, by removing the thumb screws 120, (Fig. 1) and lifting it off the plunger 112 which holds the contacts apart, and may eas y be replaced by guiding said plunger through the aperture in the base 113 of the switch when replacing the switch.

It will also be noted that fine relative adjustments between the connections for controlling the switch 108 (Figs. 1. and 4) and the connections -i'or controlling the clutch 73 will not be required. since the parts which are actuated to close the clutch may more, given amounts regardless of the 34 by the amount of motion required to olose'fthe. switch, so long as suflicient downward -motion of the switch-controlling plunger 11% is provided; any excessive motion of said plunger being idle. that the required amount of downward mo tion of said plunger 112 (Fig 4) is small,

since the plunger bears against the contact- 109 at a point near its pivot. V

It will be noted that the electric switchis accessibly located at-the rear of, and without, the framework, where it in no way .in-

terferes with the free manipulation of'the.

machine.

When a numeraLkcy 10 is in a. partially. depressed position, the master-whee. 42 may be in an abnormal position and out of meshing relation with those of the computing wheels 45 which are out of mesh with the master-Wheel, so that the teeth of the master wheel 12 will lie in the path of travel of: the teeth of thecomputing wheels 15 when the latter are in a. normal position.

If any of the computing wheels 45 are at this time beyond the master-wheel 42 and the carriage 17 is returned, the teeth of said wheels, being in a colliding. position, will arrest the return of said carriage when a collision occnrs between the teeththe carriage 17. is prevented from returning to avoid collision of the teeth of the computingwvheels -15 with the teeth of the masterwheel 42 by locking the returning mecha nism.

For this purpose, each numeral key-lever 12 (Figs. 1, 3 and 4) is. provided with. a. pendent plunger 125 pivoted on the numeral ey-levers and guided at its lower end in a slot 126 formed in a transverse angle bar 127 of cross-sectional .L-shape, to hold said plunge'rs against forward and rearward displacement. .The lower end of each. of the plungers 125 is arranged to pass between a pair of adjacent pendants 128 pivotally mounted at 129 on said L-shaped bar 127, one pair of pendants 128 being provided for each numeral key plunger 125.

The pendants 128 are spaced along the transverse bar 12?.relatively to the thicln ness of the plungers 125, so that only one plunger at a time may pass between an pair of pendants, as seen at Fig. 3. Al the lost-motion between. the entire train of pendants will be taken up when a single plunger 125 passes therebetwecn, so that 'no other key plunger 125 may pass there- It will also be seen be. automaticallyreturned.

between, the pendants beingconfined. at each end of the train by pins 130 (Figs. 1, 3 and 4) fast on said. L-shaped bar 12?, thus preventing the simultaneous actuationof two or more numeral keys.

This mechanism for preventing the simultaneous actuation of two or more numeral keys is adapted to prevent the actuation of the carriage-returning mechanism during the actuation of a-numeral key.

A vertically-disposed member 132 (Figs. 1, 3 and 4), in the form of a bar or plunger, is connected to be actuated by the carriage' returning mechanism, and, when so actuated, passes between one of a'pairof pendants 128 and an adjacent pendant 133, similar to the pendants 128, said pendant 133 being one of said train of pendants.

It will be seen that when anumeral key 10 is depressed and all the lost-motion between said pendants 128 and 133 taken up by the associated numeral key plunger 125, the vertically-disposed bar 132 will be prevented from passing between its pendants and thereby prevent the actuation of the 'carriage returning -mechanism' with which it 18 connected.

The connections for actuating the vertically-dis )ose(.l bar 132 -when the carriage 17 reaches the end of itsv leftward travel include a forwardly-extending arm .134 (Figs. 1 ands) fast onthe rock-shaft 710i the carriagereturning mechanism, which is adapted to lie swung downwardly at the actuation of the left marginal stop 30 when" the carriage 17 reaches the end of a line and swings the rock-shaft 7]..

It will be seen that when the carriage es tension 6!) reaches the left marginal. stop 30,

when a niuneral key is in depressed position, the verticallydisposcd ba'r.;132- is lockedagainst actuation, being held against passinghetweenits pendants 128, 12-33. The release of the latch '68 when the carriage reaches the left marginal stop 30 will. howv ever,'not be prevented by the failure of said her to pass between its pendants, but the switch 108 and clutch 73 will not be cloSedI The return mechanism of the carriage will thus be held in aheyance until-the comple tion of the lip-stroke of the numeral key, when its plunger 125 will move out of engagement with the pendants 128, and the vertical bar 132' will enter octwec-n Its pen-- switch and dants 128.,133, after which the I will clutch will be c'ldsedamlfthc carriage lVhen the carriage has reached its initial position, the partsof the ca Hinge-returning mechanism will be moved in an opposite direction. through the intermedlary of the connections 91. and 72,,to restore said parts and the latch 68 to their normal positions a'nd'to I acting with the mechanism for locking the 'lhe'machine, herein illustrated.

tions, the motor 86 will continue in its efforts to drive the carriage l7 and may Wreck the machine. In case the parts are of sufiicient strength to avoid wreckage, the carriage 17 and totaliz-er la thereon will not-be denominationally positioned in accord' with the denominational value of the actuated tabulator-kev 50.

. To prevent any tabulator-key 50 from being depressed during a return movement of the carriage 17 there is provided a mechanism, substantially as illustrated and described in my co pending application, Serial No. 181,460, filed Ju'lyl9, .1917, (now Patent No. 1,349,386 dated August 10,- 1920) co carriage against returning during the actuation of a numeral. key. The mechanism disclosed in said application includes a lever 14'? (Figs. 1 and a) common. to the keylevers 51 of the tabulator-keys and placed to. he actuated thereby at the depression of a )tabulator-key. Sa d lever. 147 is connected to swing an arm 150 into and out of engagement withsaid pendants 128; It

will be seen that when the lost-motion hetween said pendants 128 is taken up by the vertical bar 132 olf'the carriage-returning mechanism, the decimal-tabulator-keys 50 will be locked against actuation, since the. arm 150 connected with said keys 50 cannot be actuated to pass between said pendants.

In case "the left marginal stop 30 is misplaced, seas to lie within the zone of movement of the typewriter carriage 17 in a tabulating operation. or in case a tabulatorkey 50 is erroneously or accidentally actuated to cause the extension 60 to start the carriagemeturning mechanism, it will be seen that .the carriage-returning operation will beheld in abcyance, since the arm 150,

which is actuated by the depressionlof a tabulatordrey 50, is taking up all the lost ni )tion-between the pendants '128, 133, tllei'eb'ypreventing the vertical bar 1320f the carriageq'eturning; mechanism from teringbetween said pendant until th of therct'urn stroke of the tabul ator-lz at which time its associated stop 53 w out of colliding, position with the do at the rear oi the carriage;

i's allo' provided with means for returning the carriage 17 from anypomt in its travel between openthe switch 108 and clutch 73, theneby" the rightarid left marginal stops;

silencing the carriage-returning mechani.

manual carriagereturn-key 156 {Fig 1) mounted on a bell-crank 157, normally held inincll'ective posit-ion by a spring 158, 60-. acting with a oneway pawl 159 (Figs. 1 and a) to release the latch 68 of the ,carmags-returning .mechanism and thereby closethc switch 108 and clutch 73, to return the carriage l7 and the totalizers l4.- thereon,

It will bceeenthatthe depression thisv manual carnage-return-key156 cannot be effective to return the carriage during the depression of a numeral key 10, or duringthe depression of a tabulator-key 50, thereby avoiding colli sion'of the teeth of the'computing wheels 45v with the master-wheel 42, or the collision of the dogs 54 at the rear of the carriage 17 with the tabulator-stops53, since the vertical bar-132 of the carriage returning mechanism, co-acting with the 20 pendants 128, 133, cannot be raised, thereby holding, the carriage-returning mechanism in abeyance until all of the numeral keys and docimal-tabulator-keys 50 ar'e i'n their normal positions, at which time there will be no obstructions in the path of: the computing wheels 45 and the t'abulator dogs 54 during the return of the typewriter carriage and the totalizers. I

In casea, totalize'r 44: or the leftmarginal stop- 30-is erroneously placed, so that the carriage extension 60 reaches the left mar ginal stop to actuate the carriage-returning mechanism. before the computing wheel and the dial wheel 144 of lowest denomination reaches the computing point ormastcrwheel 42, collision of theteeth of the computing wheels and master-wheel will be prevented, since the pendants 128, 133, associated with the vertical bar 132, which look the carriage-returning mechanism against actuation, will be effective to prevent a carriage-returning operation under these con ditions, as well as at the end of a computation. This is also true in'case the manual carriage-returning key 156 is actuated during a computing operationbefore the com- I puting wheel 45 of lowest denomination passes the master-wheel. It will be noted that when a computation is taking place in lowestdenomination, which includes a carry-over operation, prior 1 to a carriage-returning operation, said -carry-over operation willbe completed before the carriage returning operation takes place, since said carry-over operation is completed before the end of the return stroke of a numeral key 10, prior to which-the carriage 17 cannotbe automatically returned, thereby avoiding collision of the teeth of the computing wheels 45 with the teethof the displaced carryover wheels, thus avoiding wreckage of the machine. The carnage-re turn ng operation will be prevented-under theseg cjonditions inI-the samemanner in case I the manual carriagereturnmg keyl156 1s mechanism-to lock the numeral keys when a punctuation space 162 is at the masterkeys in a punctuation space includes taptween any 0 vent the depression of any numeral key.

actuated during a carryover-operation in any denominational oosit-ion of the totaliz'er. he computing wheels,45 and dial wheels (Figs. 1 and 4) are arranged at letterspace intervals and in groups; a single let- "f0 ter space, 162 jFig. 4) being usually pro vid'ed between saidgroupsfin which a punctuation mark-may be typed upon the worksheet. 1 I i To prevent the operative fromrinadver tently actuating anumeral key when a punctuation space 162 is at the master-wheei 42, and thereby typewriting a digit, which will not be computed, there is provided wheel 42. y

The mechanism for locking the numeral pets 163 (Figs. 1 and 41) fixed at the rear of the total'izers 44:, one for-each nunctuation space 162. The tappet s 163 are placed to. en-

= gage a cam 164 on a horizontal level- 165 fulj 'crumed on the framework of the machine,

during the movement of the carriage 17 and the totalizer 44. When a numeral key 10 is actuated in the lowest denomination of a group of dial wheels 1%, the associated tappet 163 will lie adjacent to and at the right of said cam 164, whichliat the completion of the computing action, will be swung and Held rearwardly by said tappet I 163, thereby swinging the other end of said lever 165 forwardly to swing a bell-crank 168, pivoted on the, framework of the machine, to raise a rearwardly-extending arm 169 of said bell-crank 168 which has a pin 170 fast thereon, to the freeend of which is connected a spring 171., the other end of I which is connected to a pin 17 2 fast onthe vertically-disposed bar 132 of the carriagereturning mechanism, to raise said bar through the intermediary of said spring, so I that it will pass between its adjacent pendants 128, 133, thereby taking up all the passage of any other member beprevent the f said pendants, and thus pre-.

At the actuatlon' of a character key 11, to print a punctuation mark at said punctuation space 162, or at the actuation of the usual space-key 173, the carriage 17 will move an additional letter-space and move said tappet 163, which is in engagement with the cam 164 of the lever 165,. out of engagement with said cam 164, thereby permitting said lever and. connected parts, in-'- cluding'the vertically-disposed bar 132,130 return to their normal positions, in whlch a 126 numeral key may be depressed and computation continued. I

The combination is such that,' in' case the escapement mechanism 22 is efl'ectiue to letter space the. carriage 17 before an actuated 130 numeral key is returned to its normal position, when computing 1n l west dcnomb;

nation of a group of dialwheels, said carriage and totalizer 141 thereon will not b e prevented from moving in a letter-feeding direction; The typewriter carriage letterfeeds at the upstroke of a numeral key when the associated plunger 125 lies between its pendants 128; At this time the vertical bar 182 cannot be actuated, but the carriage 1'] will be free to move in letter-feeding direction, since said bar 132 does not positively hold the bell-crank 168 and the horizontal lever 165 connected therewith, the spring 171' providing a flexible connection, thus permitting said, horizontal lever 1G5 and bell-crank 168 to be actuated as a tappet 163 passes over the cam 164 of the lever 165, While the vertical barl33 remains immovable. At the end of the upstroke of the numeral key, its plunger 125 will move out of engagement with its pendants 128, thereby permitting the spring 171 to draw the vertical bar 132 upwardly so that it may pass between the pendants'128, 133, to lock the numeral keys against actuation when a punctuation space 162 is at the computing point.

To permit the vertically-disposed bar 132 to rise, without disturbing the carriagereturning mechanism, when actuated by' a tappet 163 at a punctuation space, the slot 139 at the central portion of said bar is made of suflicient length to-enable said bar to'rise Without swinging the lever 136 which connects said bar with the rock-shaft 71 of the carriage-returning mechanism.

It will be noted-that economy of production is effected by employing a single vertically-disposed bar 132.1%]: locking the numeral keys and the decimal-tabulator-keys, during a carriage-returning operation; for locking the carriage-returning mechanism during the actuation of the numeral keys or the decimal-tabulator-keys; and for locking the numeral keys and decimal-tabulator keys when a punctuation space is at the computing point.

Said vertica1ly-disposed bar 132, when actuated for any purpose herein described, is returned to its normal position by a spring 176 (Figs. 1 and 1) formed so as to be over come by the spring 67 attached to the thrust bar 65 oi the carriage-rcturning keys to cause letter-feeding movements of said carriage, means rendered eflective by said carriageior returning said carriage to its initial position, and means for preventv ing the, return of said-carriage during the 70 actuation of saidkeys.

2. The combination with a traveling carriage, of type-keys, means operated by the keys to cause letter-feeding movements of said carriage, means rendered effective by said carriage for automatically returning said carriage, and means for preventing the urging of said carriage in a return direction by said returning means when a key is in actuated position. 3. In a combined typewriting and computing' machine, the combination with a traveling carriage, of numeral keys, means operated by the keys to cause letter-feeding movements of said carriage, motordriven means controlled by said carriage for automatically returningsaid carriage, and means for preventing the control of said motor-driven means by said carriage when a numeral key is in actuated position. v

4.1m a combinedtypewriting and computingl machine, the 'combination with a traveling carriage, of numeral keys, means operated by the keys to cause letter-feeding movements of said carriage, means for automatically returning said carriage to its initial position, and means controlled by said numeral keys for preventing the -returning means from urging the return of said carriage when a numeral key is iniactuated position.

is in actuated position.

6. In a combined typewriting and com puting machine, the combination with a. traveling carriage, of numeral keys, means operated by the keys to cause letter-feeding movements of said carriage, an electric motor for driving said carriage in return direction. a normally-open switch in the cir cuit oi said motor, means for closing said switch. and means .ior locking said switch against actuation, when a numeral key is in actuated position.

In a combined typcwriting and computing machine the combination witll a traveling carriage. of numeral keys, ans operated by the keys to cause letter-fdzding movements of said carriage, a motor for 0 against closing when a numeral key is means for I closing a traveling carriage, of numeral keys,

means operated by the keys to' cause letter-feeding movements of said carriage, a motor-driven mechanism for reputing machine, the combination with a-.

turning said carriage, a normally-open clutch between said motor-driven mechanism and said carriage for actively connecting said carriage and said mechanism, said clutch, and means for locking said clutch against actuation when a numeral key is in actuated position.

9. Iii a combined typewriting and com puting machine, the combination with a traveling carriage, of numeral keys, means operated by the keys to cause letter-feeding movements of said carriage, a motor-driven mechanism for driving said carriage in re turn direction, a normally-open clutch between said motor-driven mechanism and said carriage for actively connecting said carria e and said mechanism, means controlle by said carriage for closing said clutch, and meansfor locking said clutch 1n actuated position.

10., In a combined typewriting' and computing machine, the combination with, a travelin carriage, of numeral k eys, means operat mechanism for driving said carriage in return direction, a normally-open clutch for actively connecting said motor-driven mechanism and said carriage4 means controlled by said carriage for. closing said clutch,-

mechanism for preventing the simultaneous actuation of two or more numeralkeys, and

.means cooperating with said last-named mechanism for preventing the closing of said clutch when anumeral key is in actuated position. v

11. In a combined typewriting and computing machine, the combination with a traveling carriage, of numeral keys, means operated by the keys to cause letter-feedingmovements of said carriage, an electric motor for driving said carriage in return direction, a normally-open switch for closing the circuit throughsaid motor, means con by the keys to cause letter-feeding movements of said carriage, a motor-driven putin" machine, a the combination with a have ing carriage, of keys, means operated by the keys to cause letter-feeding movements'of said carriage, means for automatically returning said carriageto its initial position at the end of .a key actuation,

means controlled by said carriage for initiating said carriage-returning operation, and means for holding said carriage-returning means in" abeyance until the end of said key actuation." x

13. In a combined typewriting and comtraveling carriage, of numeral keys, means operated by the keys to'cause letter-feeding movements of said carnage, means controlled ,by the carriage for. automatically re- 14:." n a combined typewriting and computing machine, the combination with a traveling carriage, of numeral keys. for

causing letter-fe'eding movements of :said carriage when actuated, a motor-driven mechanism for driving said carriage in returndirection, a normally-open clutch for actively connecting said motor-driven mach-- anism with the'ca'rriage, means controlled by the carriage for closing said clutch, mechanism for preventing the simultaneous actuation of two'or more numeral keys, and a member connected with said clutch-closing means, and cotiperating with said lastnamed mechanism, for preventing the closingof said clutch when a numeral key is in actuated position. ii, I

15. In a combined typewriing and computing; machine, the combination with a traveling carriage, .of numeral keys for causing letter-feeding movements of said carriage when actuated, an electric motor for driving said carriage in return direc-' tion, a normallywpen switch for closing the circuit through said motor, means'controlled by said carsiage tor .closing said switch, mechanism for preventing the simultaneous actuation of two or more numeral keys, and a member connected with said switch-closing means, and coiiperating with said mechanism, for locking said switch against actuation when a numeral key is in actuated position. r

16; In a combined typewritingvand 'com- .puting machine, the combination. with a traveling carriage,- of' numeral keys for causing letter-feeding movements'of said carriage .when actuated, a motor-driven mechanism for driving said carriage in re:

turn direction, a normally-open clutch for 1 actively connecting said motor-driven mechanisin' with said carriage, an electric motor for driving said motor-driven mechanism, a normally-open switch for closing the circuit through said motor, means controlled by said carriage for closing said switch and clutch, mechanism for preventing the simultaneous actuation of two'or more numeral keys, and a member connected with said switch and clutci'i-closing means,- andv cooperating with said'last-nained mechanism,

for locking said switch and cinch againstactnation'.

'17. In a combined typewriting and computing machine, the combination with a traveling vcarriage, o fke'ys for causing letter-feeding movements of said carriage when actuated, means for returning *said carriage to its initial position, at the end-of a key-actuation, manually-operable means for initiating said carriage-returning operation, and means for holding, said carriagereturning means in abeyancefnntil the end of said key-actuation.' i v 18. In a combined typewriting' and com puting machine,. the combination vwith a traveling carriage, of numeral keys, means operated by the keys to cause letter-feeding movements of saidcarriage, a motordriven mechanism for drivingsaid carriage in return direction,a normally-open clutch for activelyconnecting said motor-driven mechanism with the carriage, an electric motor for driving said inotor-clriven mechanism, a' normally-open switch. for closing the circuit through SftlClmOtOl, means con? trolled b a key "for closing. said switch and clutch, mechanism for preventing the simul? taneous actuation of two'or more numeral keys; and a' member connected with said switch and clutch-closing; means, and cooperating with said last-nained mechanism, for lockinglsaid switch and. clutch against actuation when a numeral keyis in actuated position.

19. In a combined typewi-iting and computingimachi'ne, the combination Wltli a travelin cai' 'iiweof numeral kevs means operatedby the keys to cause letter-feeding v movci'nents oi said carriage, means for automatically returning said carriage tofits [initial position, a normally'efl'ective latch for holding said carriagea'eturning means lIL-iHOi'l HtlVQ position, means controlled by said carriage for moving said latch to ineffective position, and meanst'or holding: thev i-ai-i'iaflv i'etui'ninir means in ineiiei-tivc posi-- tion during: the actuation of a numeral key when said latch is in incllc tii'e position.

20 In a ('UllllilllWl-iyPOWIlLiHQ and conipolio;- machine, the combination with a traveling carriage, of a totaliZci' traveling \\'ith said carriage, and comprising (011]- pnting wheels arranged in groups to providc punctuation spa -cs. a master wheel cooperating with said computing wheels,

ing said returning qnirncra1 key is in actuated position.

means for returning said carriage to its initial position, and meansfor preventing the return of said carriage when said masterwh'eel is opposite one of said punctuation spaces.

21. In a combined typewriting and min puting'inachine, the combination with a traveling carriage, of a computingelement traveling with said carriage, a substantially stationar computing element cooperating with said traveling computing element, mo

tor means for returning said carriage to its initial. position, and means for preventing the, urging of saidcarriage in a return .direction, by said returning means,during a coinputing action.

;trolling means from establishing such connection between said carriage and said carriage-returning means during the actuation of said keys. j

23. The combination with a traveling carriage of type-keys, means operated by the keys to cause letter-feeding movements of said cari'iage, motor means for returning said carriage, normally disconnected .from said carriage, controllingineans to establish a connection between said returning means andsaid carriage, and means to prevent the establishment of'such connections when a key is in actuated position.

The combination with a traveling carriage, of numeral keys, means operated by the keys to cause letter feeding movements of said carriagc,'motor driven means controlled by said carriage for automatically returning the same, and means to prevent said motor-driven means from urging said carriage iii-the return direction when a nuineral key is in actuated position;

25. The combination with a traveling car means operated by riage, of numeral keys, the keys to cause letter-feeding movements of said carriage, means for automatically returningsaid carriage to its initial position,

carriage-controlled means tending to render said-*i"eturning means reflective, and means controlled ln" said numeral keys to prevent said cari-iago-controlled means from rendermeans eflective when a an. in a. combined typewriting' and com puting machine, the coinl'iinat-ion with a traveling carriage, of a 'com nting element traveling with said carriage, a substantially statioi'iary computing element coil 'ierating with said traveling computing element, means for returning said carriage to its iniwas,

mg action durin'g'a computing action, and

" means for holding said carriage-returning means in abeyance until the end of said computing action.

27. In a combined typewriting and computing machine, the combination with. a traveling carriage, of a computing wheel traveling with said carriage, a master wheel cooperating with said computing wheel, means for automatically actuatin said carriage when said wheels are in mes ing posi-' tion, mechanism on said carriage for initiatmg said carriage actuating operatiommeans for preventing said automatic carriage-actuation when said wheels are in colliding posi-.

tion, and means for holding said automatic carriage-actuating means in abeyanceuntil switch. for closing the circuit through the said wheels are in said meshing position.

28. The combination with a traveling carriage, of numeral keys, means operated by said keys to cause letter-feeding movements of said carriage, motor means for driving puting machine, traveling carriage, of a totahzer master wheel is in said carriage in the return direction, a controlling .device for starting said motor means,

and means to prevent-the starting of said motor-means by said controlling device when a numeral key is .in actuated position.

29. In a combine'd'typewriting a'nd 'com-' puting, machine, the combination 7 with a traveling carriage, of a computing element traveling with said carriage, a substantiallystationary computing element cooperating with said traveling element, numeral keys controlling sa d computing elements, mechanism for preventing simultaneous actuation of two ormore numeral keysgmeans for re-- turning said carriage to its initial position, and a member connected with said carriageretiirning means, and cooperating with said mechanism, for locking said carriage-returning means against actuation during a computing action.

30. The combination with traveling caFf riage, of numeral -keys, niiineral-key-actuated means to cause letter-feeding movements of said carriage, motor mechanism for returning said carriage, a normally open con-'.

necting device between saidmotor anechanism and said carriage, means for rendering said connecting device effective, and means for preventing said connecting device from being rendered effective during the actuation of a numeral key.

31. In a combined typewriting and comthe combination Witha traveling with said carriage, a master wheel cooperating with said totali'zer, motor-driven means for returnin said carria e to its initialposig g 'with said traveling comput ng element, mo- 1 tion, an electric switch for closing the C11- cuit through the'motor, and means for loching said switch against actuation when said i an abnormal-position,

3 2. In a combined typewriting and computing machine, the combination witha traveling carriage, of a totaliz'er traveling with said carriage, a master wheel co Ina combined typewriting and computmg machine, the combination with a traveling. carriage, of a computing element traveling with said carriage, a substantially stationary computing element coiiperating with said traveling computing'element, a motor-driven mechanism for returning; said carriage to its initial position, an electric' motor, anorm'ally-open clutch for-actively connecting said mechanism with said carriage, and a single means for simultaneously locking said switch and clutch against actuation during a computing action.

34, Ina combined typewriting andcomputing machine, the combination with-a traveling carriage, of a totalizer traveling withsaid carriage, a master wheel cooperating with" said totalizer. normally-ineffective means for returning saidcarriage to its initial position, means for locking said carriage-returning means in -.'inefi'ective position, means controlled by the carriage for releasing said carriage-returning means, and meansfor rendering said releasing means ineffectivewhen said master wheel is in an abnormal position.

.35. In a combined typewriting and computing machine, the combination with a traveling carriage, of a computing element traveling with said carriage, .a substantially-' stationary computing element cooperating with said travelingelement, numeral keys controllingsaid computing elements, niecha nism for preventing the simultaneous actua tion of two or morenumeral keys,' a normany-ineffective means for, returning said carriage to its initial position, a latch for, locking said carriage-return ng means in inefiective position, means controlled by the carriage for releasing said latch, and means cooperating with said mechanism for renderinn; said released latch ineffective when, said stationary'computing element is in an abnormal position. I H V .36. In a combined typewriting and computing machine, the combination with a traveling carriage, of a computing element traveling with said carriage, a substantiallystationary computing element coiiperating tor-driven means tor returning said carriage to its initial position, an electric sw tch for means for locking said switohagainst actua ti'on during a computing action. I 37. Ina combined typewriting and computing machine, the combination with a 6 traveling carriage, of a computing element traveling with said carriage, a substan' tially-stationary computing element cooperating with. said traveling computing element, a motor-driven mechanism for returning 10 Said carriage to its initial position, a normolly-open clutch for actively connecting said mechanism with the carriage, and means for locking said clutch against closing during a, computing action.

38. In a combined typewriting and computing machine, the combination with a carriage, of means for causing jump movements of said carriage, means for returning said carriage to-its initial position, andmeans for preventing the returning means from urging said carriage in a return direction during the actuation of said means for causing said jump movements. 1

39. In a combined typewriting and com puting machine, the cornioination with a can riage, of means for positioning said carriage denominationally prior to a computing action, means for returning said carriage to its initial position, and means for preventing the return of said carriage during the actua- I tion of said denominational-positioning means. v

40. In a combined type-writing and computing machine, the combination with a car- 3 riage, of a decimahtabulating mechanism for. said carriage, means for automatically returning said carriage to its initial posi' tion, and means for preventing the retui n of said carriage during the actuation of said 40 decimahtabulating mechanism.

41. In a combined typewriting and computing machine, the combination with a car- :riage, of a decimal-tahulatmg mechanism for said carriage, a plurality of keys for 5 actuating said decimal-tabulating' ,mecha nism, means for automatically-returning said carriage to its initial position, and means for preventing! the reiurn oi sai carriage during the actuation of any one of said keys. I v

.42. In a combined typewriting and !]!1- puting machine, the combination with a carriage, of a decimal-tabulat1ng mechanism for said carriage, a "plurality of keys 55 whereby said dccimal-tabo'lating mechanism may be actuated, means for automatically returning said carriage to its lilltlalposition, and means for preventing the IQlillln oisaid carriage when a key is in actuated "'tion; 5 m 35in a combined typewriting and com-- puting traveling carriage, of decunal-ta-hulating chanism for said carriage including a plulity of denominational stops, .keys for i i x machine, the combination with a moving said stops into the path of dogs on said carriage, means for automaticallyareturning said carriage to its initial position, and means 101? preventing the returnof said carriage when any one of said stops isin the ath of a dog.

a l. .n acombined typewriting and-'com'- putmg machine, the combination witlr'acarriage, of a decimal-tabulating mechanism 1 for tsaid. carriage, means for automaticallyreturning said carriage to its initial position, means on said carriage for initiating sa d carriagereturning operation whensaid' decimal-tahulating mechanism is actuated and means for holding said carriage-returnm ing means in aheyance until the endof said decimal-tahulating action.

45. In a combined 'typewiiting and com-" puting machine, the combination with ii carriage, of a decimal-tahnlating mechanism lia for said. carriage, a normally-ineffective motor-driven mechanism for returningsai carriage to its initial position, a 'switch for closing the electric circuit thiiough' 'tlie motor, and means for preventing the closing whensaid key is operated during the actua tion of said denominational-positioning"= means. I v c 47. In a combined typewriting and e'omputing machine, the combination with a "car'- riage, of a decimal-tahulating inechanisiu for said carriage, keys for actuating said decimal-tabulating mechanism, a computingif mechanism, numeral, keys controlling "said computing mechanism, mechanism for pre-- venting the simultaneous actuation of a 'numoral key and a decimal-tahulating"key{ means for automatically returningsaid car riage to its initial position, and means co' operating with said last named mechanism for preventing the return of said carriage during the actuation of any one of said keys, 48. In combined typewriting and com" puting machine, ,the combination with n traveling carriage, of decimal-tabulating mechanism for said carriage includingn" 129 plurality of substanti'aEly-stationary denomi national stops, keys for movlng'said tops into the path of dogs on said carriage,Ia

motor-driven mechanism for automatically returning said carriage to its initial-posi fii tion, switch actuahle for closing the on" cuitthrough the motor, and means for preventing the actuation of said sw tch when i a stop is in the path of a dog.

49. In a combined typewriting and com- 130 messesinto the path of dogs on said carriage, s

motor-driven mechanism for automatically returning said carriage to its mid/ml position, a normally-open clutch for actively connecting said last-rimmed mechanism with said carriage, and means for preventing the closing of said clutch when a stop is in the path of i dog.

.50. in a combined typewriting and coniputing machine, the combination with s cmriage, of a decimel-tabuist-ing mechanism for said carriag a normally-ineffective motor driven'mechunism for returning said car riage to its initial position, a normally opera clutch for actively connecting said lastnsmed inechsnism with said carriage, and means for preventing the: closing oi said clutch during the actuation of said decimal: tahulsting mechanism.

51. In a combined typewriting and computing nmchinc, the combination with a cerriagc, of type keys, means operated by the keys'fto cause lcttecfccding' movements of said carriage, means rendered efiectiye by said caii isge for peturning' said carriage to its initial position, mechanism for preventmg the simultaneous actuation of two or 'more of said keys, and means for rendering said preventing mechanism eiieciive to loclt all of said keys against actuation during the return movement of the carriage.

52. In a combined,typevvriting and computing machine, the combination with a can.

riage,of"numeral keys, means opecatcd by the keys to cause letter-feeding movements ofsa-id carriage, means rendered eilective by said carriage for automatically returning.

said carriage to its initial position, mechanisin fior preventing the simultaneous sctua lci'on of two or more of said keys. means for rendering said preventing mechanism ei fcctivc to lock all oi said ltevs a ainst actuetion during the return IHOVQIIIQI'lfiOf said carriage, and means for'unlocltnig said keys when said carriage reaches lts initial p051- iiionr in afcombined 'typcwritingz and computing machine, the combination with a cur-liege, oi numeral keys, means operated by the lteys'to cause letter-feeding inovcments of said carnage, an electnc motor driven mechanism for returning. said car- 'i'isge to its initial position, a switch placed in the circuit of the motor; means controlled by saic carriage for closing said switch at a letter-feeding movement of said carriage, means for opening said switch when the curriagc reaches itsv initial position, mechanism for px'cventing the simultaneous actuation o o;- more of said keys, and means tor.

sis.

the keys to cause letter-feeding movements of said carriage, an electric motor-driven mechanism, including a normally-open clutch, for returning said carriage to its initial position, means controlled by said carriage for closing said clutch at a letter-feeding movement of said carriage, means for opening said clutch when the carriage reaches its initial position, mechanism for preventing the simultaneous actuation 0t two or more of said keys, and means wherehy'ssid nreventing mechanism will be ren-' dered cfiect ve to lock said numeral keys againstuctuzition' when said clutch is closed.

in a combined typewritmg and computing machine, the combination with a carriage, of numeral keys, means operated by the keys to cause letter-feeding movements of said carriage, an electric motor-driven mechanism, including a' normallyopenclutch, for returning said carriage to its 1mtiai position, a switch placed in the circuit "of the motor, means controlled by the cm:-

riage for simultaneously closing said switch and clutchat a letter-feeding movement of the carriage, means for simultaneously opensaid switch and clutch when the carriuge reaches its initial position, mechanism for preventing the simultaneous actuation of two ox' more of said keys, and means whereby said preventing: mechanism will. be

rendered effective to lock the numeral keys against actuation when said switch andclutch are closed.

56. The combination with a traveling curnsge-of numeral keys, numeraLkey-actuatcd means forcausing letter-feed movev ments of said carriage, motor mechanism for driving; said carriage in the return direction. a normally ineffective device for connecting said motor mechanism with said carriage, a controlling device for rendering said motOIUIIlQCl'lflHlSTfl effective, carriage-controlled means to render said connecting device effective and to actuate said controlling device to render said motor mechanism eiiective, and means to prevent said connecting device and said niotor mechanism from being rendered efiectivc during the actuation of a numeral key.

57. In a combined typewriting and computing machine, the combination with u traveling. car'iage, of e computing meclia nism including numeral keys and a master wheel, means for causing a lcttenfeedmg movement of said carriage, means rendered effective by said carriage for returning said carriage to its initial position, mechanismfot preventing the simultaneous actuation of two or more of said keys, and means, al

fective through said preventing mechanism, to prevent actuation of said computing mechanism by. the'numcral keys during the return movement of said carriage.

58. In a combined typewriting and computingmachine, the combination with a carriage, of numeral keys, kcy'operated means to cause letter-deciding: movements of the carriage, carriage-return means rendered ef fective by said carriage when it reaches a predetermined position mechanism whereby actuation of one of said numeral keys\vill effect locking of the others, and means effective during a carriage-return movement to modify the operation of the locking mech anism, so to lockall of said numeral keys thereby.

59. In acombined typewriting and computing machine, the combination with a carriage, ot' numeral keys, key-operated means to cause letter-feeding movements of the carriage, automatic carriage-return means, a locking device normally efiective upon actuation of one of said numeral keys to lock the others, means whereby said device will be caused to lock all of said numeral keys during the return movement of the carriage, and means lfor restoring; said locking device to its normal condition when the carriage reaches a predetermined position in its return movement.

a 60. In a combined typewriting and computing machine,-the combination with a carriage, of numeral keys, means operated by the keys to cause letter-feeding movements of said carriage, means for automatically returning the carriage to its initial position, mechanism whereby actuation of any one of said numeral keys will effect a locking of the others, means actuated by said carriagereturning means for rendering said mechanism effective for locking all of said keys against actuation during the return of said carriage, and means for unlocking saidkeys when said carriage reaches its initial position.

? mg said controlling device, means controlled by," the carriage lfor tripping said latch to release the controlling device, means for re- Storing said controlling device to the control of said latch when the carriage reaches the end of its return movement, and means whereby ellective movement of said controlling device will be delayed in case said latch is tripped while a numeral key is in essee;

depressed position, until the numeral key is restored to normal position.

In a combined typewriti'ng and computmg machine, the combination with a carrange, of numeral keys, means-operated by the keys to cause letter-feeding movements of 881d carriage, a normally inetlective means for automatically returning said carriage to itsinitial position, a. latch for locking said carriage-returning means in normal position, means controlled by the carriage for tripping said latch to move the our riageq'eturnmg means to effective position, means for holding said latch inactuated position, means for returning said latch to eil'ective position when said carriage reaches its initial position, and means whereby, in case a numeral key is in actuated position when said latch is tripped, the carriage.

returning means will be maintained in in- 7 effective condition until the numeral key is returned to normal position.

63. in a combined typewriting and computing machine, the combination with a carriage, of means for controlling the movemeut of said carriage comprising numeral thrown into action to lock all otsaid keys.

64. ln :1 combined typewriting and computing machine, the combination with a traveling carriage, of a totalizer on said carriage, a master wheel coiiperating with said tot-alizer, numeral keys controlling the master wheel, mechanism whereby actuation of any one of said numeral keys will lock the other numeral keys. means for denominationally positioning said totalizer relatively to the master wheel. means for returning said carriage to its initial position, and means controlled by said carriage-returning means to render said mechanism effective to prevent the actuation of said denominational positioning means during the return movement of the carriage.

65. In 'a combined typewriting and computing machine, the combination With a traveling carriage, 0t a totalizer on said carriage, a master wheel cooperating with said totalizer, numeral keys controlling the master wheel, mechanism for preventing the simultaneous actuation of two or more numeral keys, means for denominationally positioning said totalizerrelatively to the master wheel, means for returning said carriage toiits initial position, a member con-v trolled by said carriage-returnlng means,

and coiiperating with said mechanism, e'felement onsaid carriage, a; non-traveling computing element cooperating with 2 sai traveling computin' I element,"' tabulatin means for demoninatzonaily positioning mi of wheels, numera space is at a computing point and during traveling computing 'element." relativelyto the non-traveling computing element, means for returning sa d carriage to its initial po- 0 i the actuation of said tabulatm sition, and a, single means for preventing means and the actuation of the computin e ements dur-- ingthe return movement of t e' carriage.

67. In a combined typewriting and computing machine, the combination with atravcling carriage, of groups of computing wheels on said carriage, s aces between said groups- I keys,'means operated by the keys to actuate said wheels and 'the carriage, means for returning said carriage toits initial position, and a single member effective to lock the numeral 'keys 7 when a the return of said carriage.

68'.- In a combined-- typewriting and -com-,'

puting machine, thecombination with a travelingcarriage, of groups of, computing Wheels on said carriage, spaces between said groups'of wheels, numeral keys, means operated by the keys to actuate said wheels and the carriage, means for returning said carriage to its initial position, a single look ing member efl'ective on the numeral keys when a space is at the computing point and during the return of said carriage, and means for rendering said locking member inefi'ective when a' computing wheel is at the computing point.

69. In a combined typewriting and computing machine, the combination with a travcling carriage, of groups of computing wheels on said carriage, punctuation spaces between said groups of wheels, numeral keys, means operated bythe keys to actuate said wheels and the carriage, means for returning saidicarriage to its initial position, a single locking means for said numeral keys effective when any one of said spaces is at the computing point and during the return of said carriage, and means for 'ren during said key-locking means ineffective when the carriage reaches its initial position.'

70. in. a combined typewriting, and comp'iting machine, the combination with a carriage, and

its initial position,

traveling carriage, of a total izer on said carriage including groups vof computing wheels, punctuation spaces" between said groups 0 wheels,-numeral keys, means operated bythe keys-to actuate said wheels and the carriage, means for returning said carriage to its initial position, mechanism controlled by the totalizer for locking said keys against actuation when a punctuation space reaches the computing point during a letter-feeding movement of the carriage, and

means for rendering said mechanism un'- "controllable by the totaliz'er during a return movement of said carriage.

I 71: In a combined typewriting and com puting machine, the combination with a traveling carriage, of a totalizer on said carriage including groups of computing wheels, punctuation spaces between said groupsv of wheels, numeral 'keys, means operated by the keys to actuate said wheels and the carriage,-means for returning said carriage to v cams on said totalizer placed in accord with said punctuation spaces, mechanism controlled by said cams a space is at the computing polnt, and means to prevent actuation of said mechanism by said. cams during a return movement of said carriage, i

72. In'a combined typewriting and computing machine, the combination with a trav v cling carriage, of a totalizer on said carriage including groups of computing wheels, punctuation. spaces between said groups of wheels, numeral keys, means operated by the keys to actuate said wheels and the carriage, means for returning said carriage to its initial position, mechanism for preventing a simultaneous actuation of two or more numeral keys, and means controlled by the totalizer coiiperating with said mechanism for preventing the actuation'of any numeral key when a punctuation space is at the computing poin 73. In a combined typewriting and computing machine, the combination with a traveling carriage, of a totalizer' on said carriage including groups of computing Wheels, punctuation spaces between said groups of 'wlieels,numeralkeys, means operated by a single actuation of the keys to actuate said wheels and the'carriage, meansfor returning the carriage to its initial position, mechanism for preventing a simultaneous actuation of two or more numeral keys, :1 member controlled by said carriage-returning means,

and coiiperating with said mechanism, for locking the keys against actuation during a return movement of the carriage, cams on said totalizer placed in accord with said punctuation spaces, and a lever controlled by the cams and actively connected with saidmember for lockingsmd keys aga nst actuat-ion when a space is at the computingpeint,

90 -for locking said keys against'actuation when 83. In a combined typewriting and computingmachine, the combination with a carriage, of tabulating means forpositioning said carriage, means, including a manuallyoperable key,v for causing a return movement of said carriage to its initial position, and means for preventing the return '03": said carriage when said key is operated during the actuation of said tabulating means.

HENRY L. PITMAN.

Witnesses:

CATHERINE A. NEWELL, ARTHUR A. JOHNSON. 

